#include <Servo.h> 
Servo myservo;

const int servoPin = 19;  
const int buttonPin = 15; 

void setup() {
  myservo.attach(servoPin); 
  pinMode(buttonPin, INPUT);
}

void loop() {
  int buttonState = digitalRead(buttonPin);
  
  if (buttonState == HIGH) {
    myservo.write(90);
  } 
  else {
    myservo.write(0);
  }
  delay(20);
}